MySQL syntax error when using smart group(s) in CiviReports which are based on dates.

Hello,

We are trying to use smart groups as a search criteria in all CiviReports, but we get the following error. The smart group is based on dates within a relationship.

Thanks in advance for sorting out for all of us!

Database Error Code: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '22:24:06)) >= 0))' at line 4, 1064
Additional Details:
Array
(
[callback] => Array
(
[0] => CRM_Core_Error
[1] => handle
)

[code] => -2
[message] => DB Error: syntax error
[mode] => 16
[debug_info] =>
SELECT g.id
FROM civicrm_group g
WHERE g.id IN ( 11 ) AND ( g.saved_search_id IS NOT NULL OR g.children IS NOT NULL ) AND
(g.cache_date IS NULL OR (TIMESTAMPDIFF(MINUTE, g.cache_date, 2011-02-25 22:24:06)) >= 0))
[nativecode=1064 ** You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '22:24:06)) >= 0))' at line 4]
[type] => DB_Error
[user_info] =>
SELECT g.id
FROM civicrm_group g
WHERE g.id IN ( 11 ) AND ( g.saved_search_id IS NOT NULL OR g.children IS NOT NULL ) AND
(g.cache_date IS NULL OR (TIMESTAMPDIFF(MINUTE, g.cache_date, 2011-02-25 22:24:06)) >= 0))
[nativecode=1064 ** You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '22:24:06)) >= 0))' at line 4]
[to_string] => [db_error: message="DB Error: syntax error" code=-2 mode=callback callback=CRM_Core_Error::handle prefix="" info="
SELECT g.id
FROM civicrm_group g
WHERE g.id IN ( 11 ) AND ( g.saved_search_id IS NOT NULL OR g.children IS NOT NULL ) AND
(g.cache_date IS NULL OR (TIMESTAMPDIFF(MINUTE, g.cache_date, 2011-02-25 22:24:06)) >= 0))
[nativecode=1064 ** You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '22:24:06)) >= 0))' at line 4]"]